B2 2125+35 multiwavelength SED

Also known as 1FLAT J212743.0+361305, 2FGL J2127.8+3614, 2WHSP J212743.0+361305, 3FGL J2127.7+3612, 3HSP J212743.0+361306, 5BZB J2127+3613, CRATES J212743+361251.

• Class: BL Lac
• Redshift: z = 0.876
• Position (ICRS): RA 321.92929°, Dec 36.21826°
• Data: 2,385 points (13 upper limits) from 28 catalogues
• Dated data: 2009–2024 (MJD 55019–60609)
• Undated catalogue values: 69
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, X-ray, γ-ray)
• Largest catalogues (points): ZTF (1,102), NEOWISE (724), ASAS-SN (310), WISEME (108), PanSTARRS-LC (62)

Get the data

• The SED as CSV from the MMDC SED API (docs.mmdc.am).
• In Python, with astro-mmdc:

  from astro_mmdc import MMDC
  sed = MMDC().sed.get(ra=321.92929, dec=36.21826, name="B2 2125+35")

• The interactive SED plot, with time filtering and modeling (needs JavaScript).

Other BL Lac objects

• BL Lac
• TXS 2320+343
• 4C +16.67
• 87GB 214302.1+095227
• MS 2143.4+0704
• 1ES 1959+650

How to cite

Sahakyan, N., Vardanyan, V., Giommi, P., et al. 2024, AJ, 168, 289, doi:10.3847/1538-3881/ad8231 (arXiv:2410.01207).